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Power Systems QUESTIONS AND ANSWERS

Electrical Engineering : Power Systems QUESTIONS AND ANSWERS :: part1 : 16 to 20

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

16.The impedance of a circuit is given by z=3+j4. Its conductance will be

1/3

3/5

3/25

4/5

17.A consumer consume. 600 kWh per day at a load factor of 0.40. If the coneumer increases the load factor of 0.70 without increasing the maximum demand, what is the consumption of energy in kWh

950 kWh

1000 kWh

1050 kWh

1100 kWh

18.A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance perphase of the capacitor in micro-farads is

3.948

1.316

0.439

11.844

19.For a single phase overhead line having solid copper conductors of diameter 1 cm, spaced 60 cm between centers, the inductance in mH/km is

0.05 + 0.2 ln 60

0.2 ln 60

0.05 + 0.2 ln (6010.5)

0.2 ln (60/0.5)

20.The main consideration for higher and higher operating voltage of transmission is to

increase the efficiency of transmission

reduce power losses